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# Business Logic — KKW00846SF02DBean.listKoumokuIds() [17 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.KKA18001SF.KKW00846SF02DBean` |
| Layer | Bean / Data Transfer Object (Presentation tier — webview package) |
| Module | `KKA18001SF` (Package: `eo.web.webview.KKA18001SF`) |

## 1. Role

### KKW00846SF02DBean.listKoumokuIds()

This method serves as a static metadata supplier for the "Security Operation List" (セキュリティオプションリスト) data type within the K-Opticom web application's bean-based view model framework. It returns a fixed, ordered list of 14 display field name strings (Japanese labels) that represent the columns/fields presented to end users when viewing or configuring security option service contract details.

The method implements a **static factory / constant-list** pattern — it does not branch, delegate, or perform any conditional logic. Instead, it simply populates and returns a pre-defined sequence of UI label strings that map to the underlying data fields for security option services. These labels are consumed by the parent dispatch bean `KKW00846SFBean.listKoumokuIds(String key)` which routes to this method when the caller passes the key "セキュリティオプションリスト" (Security Option List).

Its role in the larger system is that of a **shared metadata provider** for the webview layer. The returned list drives UI column headers, form field labels, or report output specifications across any screen that displays security option service contract data. Being static and parameter-less, it can be invoked from any context that holds a reference to the `KKW00846SF02DBean` class without needing to instantiate an object.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["listKoumokuIds()"])
    STEP1["Initialize: ArrayList<String> koumokuList = new ArrayList<String>()"]

    START --> STEP1

    STEP1 --> END_NODE(["Return koumokuList (14 items)"])
```

This method has no conditional branches, loops, or external dependencies. The processing pattern is a straightforward sequential build:

1. Instantiate an empty `ArrayList<String>` to hold the result.
2. Append 14 pre-defined Japanese field label strings (in fixed order) to the list.
3. Return the populated list.

**No constant resolution required** — the method contains no constant lookups or conditional branches.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This is a static, parameter-less method. It requires no inputs and produces deterministic output — the same 14-item list every time. |

No instance fields or external state are read by this method. It is entirely self-contained and pure.

## 4. CRUD Operations / Called Services

This method performs **no CRUD operations**. It does not call any service components (SC), callable business services (CBS), DAOs, or any external method that interacts with a database or persistent store.

It solely performs in-memory list population using `ArrayList.add()`.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| (none) | — | — | — | This method contains no data access. It populates a Java in-memory collection only. |

Method calls made within this method:

| # | Method Call | Classification |
|---|-------------|----------------|
| 1 | `ArrayList.add(String)` (×14 calls) | In-memory list mutation — not a database operation |

## 5. Dependency Trace

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Bean:KKW00846SFBean | `KKW00846SFBean.listKoumokuIds("セキュリティオプションリスト")` → `KKW00846SF02DBean.listKoumokuIds()` | None — no downstream SC/CBS |

**Call chain details:**

- The primary caller is `KKW00846SFBean.java` (both `koptWebA` and `koptWebB` variants), which implements a dispatch router in its `listKoumokuIds(String key)` method. When `key.equals("セキュリティオプションリスト")` (Security Option List), the bean delegates to `KKW00846SF02DBean.listKoumokuIds()`.
- The `KKW00846SFBean` itself is a data type bean dispatch class used across multiple screens within the KKA18001SF module for retrieving field metadata by data type key.

## 6. Per-Branch Detail Blocks

**Block 1** — SET `(initialization)` (L836)

> Initialize the result list.

| # | Type | Code |
|---|------|------|
| 1 | SET | `ArrayList<String> koumokuList = new ArrayList<String>();` // Create empty list to hold field label strings [-> List type: ArrayList<String>] |

**Block 2** — EXEC `(append field labels 1–14)` (L837–L848)

> Append 14 Japanese UI label strings in the order they should appear to end users.

| # | Type | Code |
|---|------|------|
| 1 | EXEC | `koumokuList.add("選択区分")` // Selection classification — distinguishes choice categories [-> Field: 選択区分 = Selection category] |
| 2 | EXEC | `koumokuList.add("利用開始年月日")` // Service start year/month/day — full date at once [-> Field: 利用開始年月日 = Start date (YMD)] |
| 3 | EXEC | `koumokuList.add("利用開始日（年）")` // Service start date (year) — year component [-> Field: 利用開始日（年） = Start date year] |
| 4 | EXEC | `koumokuList.add("利用開始日（月）")` // Service start date (month) — month component [-> Field: 利用開始日（月） = Start date month] |
| 5 | EXEC | `koumokuList.add("利用開始日（日）")` // Service start date (day) — day component [-> Field: 利用開始日（日） = Start date day] |
| 6 | EXEC | `koumokuList.add("課金有無")` // Billing existence — whether this service is billable [-> Field: 課金有無 = Billing flag] |
| 7 | EXEC | `koumokuList.add("オプションサービスコード")` // Option service code — unique identifier for the optional service [-> Field: オプションサービスコード = Option service code] |
| 8 | EXEC | `koumokuList.add("表示用オプションサービスコード名称")` // Display option service code name — human-readable label for display [-> Field: 表示用オプションサービスコード名称 = Display name] |
| 9 | EXEC | `koumokuList.add("オプションサービス契約ステータス")` // Option service contract status — current state of the option contract [-> Field: オプションサービス契約ステータス = Contract status] |
| 10 | EXEC | `koumokuList.add("サービス開始年月日")` // Service start year/month/day — the service activation date [-> Field: サービス開始年月日 = Service start date] |
| 11 | EXEC | `koumokuList.add("予約可能期間")` // Reservable period — the time window during which the service can be reserved [-> Field: 予約可能期間 = Reservation window] |
| 12 | EXEC | `koumokuList.add("初回料金計算日")` // First charge calculation date — when billing calculation begins [-> Field: 初回料金計算日 = First charge date] |
| 13 | EXEC | `koumokuList.add("登録解除コード")` // Registration cancellation code — code for deregistering/unsubscribing [-> Field: 登録解除コード = Cancellation code] |
| 14 | EXEC | *(No further appends)* |

**Block 3** — RETURN `(return result)` (L849)

> Return the fully populated list to the caller.

| # | Type | Code |
|---|------|------|
| 1 | RETURN | `return koumokuList;` // Return 14-item list of security option field label strings |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `選択区分` | Field | Selection classification — distinguishes between different choice categories for security option services |
| `利用開始年月日` | Field | Service start year/month/day — the combined full date (YYYY/MM/DD) when the service began usage |
| `利用開始日（年）` | Field | Service start date (year) — the year component extracted from the service start date |
| `利用開始日（月）` | Field | Service start date (month) — the month component extracted from the service start date |
| `利用開始日（日）` | Field | Service start date (day) — the day component extracted from the service start date |
| `課金有無` | Field | Billing existence — flag indicating whether the service item is subject to charges (yes/no) |
| `オプションサービスコード` | Field | Option service code — unique alphanumeric identifier for an optional add-on service |
| `表示用オプションサービスコード名称` | Field | Display option service code name — human-readable name used in UI labels and reports |
| `オプションサービス契約ステータス` | Field | Option service contract status — current state of the optional service contract (e.g., active, cancelled, pending) |
| `サービス開始年月日` | Field | Service start year/month/day — the activation date when the service became available to the customer |
| `予約可能期間` | Field | Reservable period — the time window during which customers can make service reservations |
| `初回料金計算日` | Field | First charge calculation date — the date on which the initial billing calculation is performed for this service |
| `登録解除コード` | Field | Registration cancellation code — the code used to deregister or unsubscribe from the service |
| セキュリティオプションリスト | Business term | Security Option List — the data type key used to identify this set of security-related optional service fields |
| KKW00846SF02DBean | Class | Data-type-specific bean class that holds field metadata for the "Security Option List" data type within module KKA18001SF |
| KKW00846SFBean | Class | Dispatch bean class that routes `listKoumokuIds(key)` calls to the appropriate data-type-specific bean |

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